如何获取列表框项目的完整路径

Question

我想获得列表框项目的完整路径，因为我想显示 ImageListView 的所有项目，你能给我一些想法，如果我添加一个文件夹，A 的所有项目将显示在 ImageList 视图中然后它可以保存设置，我再次添加 B 文件夹，B 的所有项目将显示在 ImageList 视图中并保存设置。

提前致谢 ！！

        BindingSource listboxsource = null;
        public Form1()
        {
            InitializeComponent();
            listboxsource = new BindingSource(Properties.Settings.Default.listboxitems, "");
            someListbox.DataSource = listboxsource;

        }

//Add Folder in Listbox
     private void button57_Click(object sender, EventArgs e)
        {

            FolderBrowserDialog dialog = new FolderBrowserDialog();

            dialog.Description = "Please Select Folder";

            if (dialog.ShowDialog() == DialogResult.OK)
            {

                string folderName = dialog.SelectedPath;

                string s = Path.GetFileName(folderName);
                listboxsource.Add(s);

                Properties.Settings.Default.Save();
                listboxsource = new BindingSource(Properties.Settings.Default.listboxitems, "");
                someListbox.DataSource = listboxsource;    
                }
                }